EP0951648B1 - Faseroptischer stromsensorbehälter - Google Patents

Faseroptischer stromsensorbehälter Download PDF

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Publication number
EP0951648B1
EP0951648B1 EP97926438A EP97926438A EP0951648B1 EP 0951648 B1 EP0951648 B1 EP 0951648B1 EP 97926438 A EP97926438 A EP 97926438A EP 97926438 A EP97926438 A EP 97926438A EP 0951648 B1 EP0951648 B1 EP 0951648B1
Authority
EP
European Patent Office
Prior art keywords
fiber
plate
current sensor
sensor holder
fibers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97926438A
Other languages
English (en)
French (fr)
Other versions
EP0951648A1 (de
Inventor
Edward Hernandez
Trevor W. Macdougall
John A. Valenti
Jay W. Dawson
Leonard A. Johnson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Priority to EP01127910A priority Critical patent/EP1197773A3/de
Publication of EP0951648A1 publication Critical patent/EP0951648A1/de
Application granted granted Critical
Publication of EP0951648B1 publication Critical patent/EP0951648B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
    • G01R15/245—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
    • G01R15/246—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect based on the Faraday, i.e. linear magneto-optic, effect
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/007—Coil

Definitions

  • This invention relates generally to holding and supporting articles being heated in an annealing oven as basically known from EP-A-0 490 644.
  • the invention relates to a form or holder which can retain a coiled optical fiber during an annealing process.
  • the holder is subsequently incorporated into a coil assembly for a Faraday-effect magnetic field sensor.
  • a holder was provided for annealing fiber optic coils which included a silica cylinder or ring on a silica substrate such as a flat plate.
  • the fiber was wound around the cylindrical wall of the ring.
  • the ring and substrate included a hole to allow passage of a conductor whereby the ring and substrate were retained with the fiber coil and incorporated into a Faraday-effect sensor package.
  • the plate included one or more channels sandblasted or ground therein to retain the fiber ends during annealing, or included other surface structures for supporting the fiber ends.
  • the substrate functioned as another ring which supported the first ring in a vertical position, allowing the fiber ends to hang downward during annealing.
  • the holder was in the form of a coiled tube also formed of silica.
  • the fiber coil was annealed in the tube, and the coil and tube retained together as a subassembly.
  • the tube served to protect the coil.
  • the tube could have a sufficiently high pitch to space adjacent loops in the coil far enough apart to allow placement of the subassembly around an endless current carrying conductor.
  • Additional quartz tubes could be used to protect the ends of the fiber coil, which were spliced to polarizing (Pz) or polarization maintaining (Pm) fibers, and to align the ends of the coiled silica tube. Means were also provided to ensure that the ends of the fiber coil were rotationally aligned at the proper angle to the Pz or Pm fibers.
  • a flat coil i.e. substantially no helix angle, removes this problem.
  • the flat silica plate with channels was costly to manufacture and limited the design flexibility. Both of these previous methods required external packaging elements to hold the polarizing fibers.
  • the method of orienting the polarizing fibers and splicing the annealed fibers for the helical tube approach was cumbersome.
  • an optic fiber holding plate is generally designated 10 and includes a current conductor port 10a, a plurality of fiber channels such as sensor fiber channels 12, polarizing fiber channels 14 and an optional auxiliary fiber channel 16.
  • An annealing insert 18 is removably mounted in an opening 20, see also Fig. 3, formed in plate 10. Insert 18 is removable to permit fibers in sensor fiber channels 12 to span opening 20 for access to a fusion splicer (not shown).
  • Annealing insert 18, Fig. 1 includes separate fiber channels 18a, 18b.
  • a pair of pockets 22, are formed by including a portion 22a in plate 10 and a complimentary portion 22b in insert 18.
  • Annealing insert 18 is replaceable by packaging insert 24, Fig.
  • both inserts 18 and 24 include portions of polarizing fiber channels 14 and auxiliary fiber channel 16.
  • Pockets 22 are tapered, i.e, the walls 22c may be tapered top to bottom as illustrated in Fig. 2, for receiving blocks 26, Fig. 1, which may be tapered, to be seated therein. This functions as a locking device to secure inserts 18 or 24 in position with plate 10. Pockets 22 are elongated and bridge or extend transversely across a gap defined between opening 20 and either insert 18 or 24. A plurality of pockets 30, Figs. 1, 1a, are provided to bridge or extend transversely across the path of sensor fiber channels 12, polarizing fiber channels 14 and auxiliary fiber channel 16. A retainer 32, Fig. 1, is provided to be seated in each pocket 30 to hold fibers close to a floor portion 34, Fig. 1a, of each respective channel.
  • Plate 10 also includes fiber jacket mount recesses 36 for receiving jacketed fibers to be discussed later.
  • a pair of fiber channels 38 are available to lead polarizing fibers to an associated fiber annealing plate (not shown).
  • a flat reference surface 40 is provided between opening 20 and fiber channels 38 to receive quartz plates 110, Figs. 6 and 7, to which polarizing fibers 112 can be adhered to hold their orientation after annealing.
  • a plurality of through holes 42 are provided so that plate 10 can be screw mounted to adjacent plates, to be discussed later. Quartz plates 110, or a similar plate of low thermal expansion material, are used as a fixture to hold the orientation of the polarizing fibers 112.
  • the fibers 112 are affixed to the quartz plates 110 using a low modulus adhesive such as Norland optical adhesive, available from Norland Products of N. Brunswick, N.J.
  • the plates 110 are affixed to reference surface 40 using an adhesive such as Emcast 1060, available from Electronic Materials of New Milford, CT.
  • One quartz plate for each fiber 112 may be used or separate plates 110 for each fiber 112 may be used as illustrated in Figs. 6 and 7.
  • the dimensions of plates 110 are approximately 0.48 x 1.27 x 0.1 cm (3/16 x 1/2 x .039 inch).
  • a support plate 44 is provided to attach to fiber holding plate 10 via well known attachment screws (not shown) which extend into a plurality of through holes 46, aligned with through holes 42 of plate 10. Also, a current conductor port 44a is provided in plate 44 in alignment with current conductor port 10a of plate 10.
  • a cover plate 48 functions to isolate fibers which may be in fiber channels 12, 14, 16 of plate 10, from the environment.
  • Plate 48 is also provided to attach to fiber holding plate 10 and support plate 44 via the attachment screws (not shown) which extend through a plurality of through holes 50, aligned with through holes 42 of plate 10 and through holes 46 of plate 44.
  • a current conductor port 48a is provided inplate 48 in alignment with current conductor ports 10a and 44a of plates 10 and 44 respectively.
  • a plurality of counterbores 52 concentrically aligned with through holes 50.
  • a similar plurality of counterbores are aligned with through holes 46 and formed in a hidden surface of support plate 44, opposite a surface 44b.
  • a pair of angled fiber ports 54 are provided through plate 48 to permit passage of jacketed fibers which are mounted to fiber jacket mount recesses 36 in plate 10 as discussed above.
  • the connected fiber holding plate 10, support plate 44 and cover plate 48, including a coextensive current conductor port formed by aligned ports 10a, 44a, 48a, respectively, are mounted in a housing 56, Fig. 4, including separable half portions 56a and 56b, which completely enclose the connected plates 10, 44, 48, when the half portions 56a, 56b are attached, Fig. 5, by a suitable means such as an adhesive, or bolts, or the like.
  • Housing 56 includes exit passages 58, Fig. 4, for receiving jacketed fibers from fiber ports 54 in plate 48. Passages 58 may also receive strain-relief boots (not shown) for the above-mentioned jacketed fibers.
  • annular guide 60a on half portion 56a and another annular guide 60b on half portion 56b are aligned with current conductor ports 10a, 44a, 48a for accommodating a current conductor (not shown) which passes therethrough, thus permitting the housed plates to function as a fiber optic current sensor.
  • resilient vibration isolators 62 are provided to be mounted in counterbores 50 of plate 48 and the previously mentioned counterbores in plate 44, and aligned counterbores 64 in half portion 56b and other aligned counterbores (not shown) in half portion 56a. Openings 62a in isolators 62 permit the passage of the screws which interconnect plates 10, 44 and 48 as discussed above.
  • Plate 48 is preferably a machinable aluminum silicate ceramic material.
  • Plate 48 may also be of the ceramic material or can be a suitable plastic material such as a polycarbonate.
  • Housing 56 may be formed of aluminum or a suitable polymer material such as an epoxy. Screws used to connect plates 10, 44 and 48 are preferably stainless steel or a suitable polymer material such as nylon, and the resilient vibration isolators are preferably formed of a silicon RTV.
  • the ceramic package is the basic assembly for the fiber optic current sensor. It is a three layer assembly of flat ceramic plates sandwiched together to form a protective environment for the fibers. Fibers are isolated form forces resulting from handling, vibration and impact.
  • the plates consist of a fiber-holding plate assembly which holds the fibers both for annealing and packaging.
  • There is a support plate which is used to hold the fiber holding plate assembly together.
  • There is a cover plate to allow for the fibers to exit the package.
  • the ceramic package has a through-hole to allow for the current conductor to pass through.
  • the ceramic package has features for mounting to an external housing using vibration isolators.
  • the package may be coated to provide a vapor and moisture barrier such as a butyl rubber to enhance the reliability of the sensor.
  • This embodiment is for use with 5 cm (2 inch) diameter round conductors.
  • the package is 20 x 20 cm (8 x 8 inches) and each layer is 0.64 cm (0.25 inch) thick for an overall thickness of 1.9 cm (0.75 inch).
  • the ceramic is a machinable aluminum silicate. Castable cordierite and castable silica plates could also be used. The ceramic must withstand repeated exposure to temperatures up to 1000° C.
  • the fiber holding plate subassembly functions as the annealing mold and as the fiber package.
  • the subassembly consists of a main plate which receives a ceramic annealing insert.
  • the annealing insert is removable to allow for the fusion splicing.
  • There are tapered pockets which bridge the main plate and the insert to lock the assembly during the fiber annealing.
  • Flat channels are used to hold the annealing fiber, the polarizing fibers, and auxiliary fibers such as fiber depolarizer. Separate polarizing fiber channels avoid stacking of the polarizing fiber coils and reduces the preload on the fibers. Recesses or pockets along the fiber channels receive retainers which hold the fibers close to the channel floor and limits the out-of-plane movement of the fiber thus reducing vibration sensitivity. Out-of-plane movement and vibration sensitivity of the annealed fiber is further restrained by the use of high viscosity silicon oil, Fig. 6, placed directly on the fiber. The silicon oil functions as a vibration damping agent and is applied in sensor fiber channel 12, Fig. 6.
  • the oil wets a sensor fiber 114 to the base of channel 12 due to the surface tension of the silicon oil.
  • Other materials or methods may be suitable to achieve the same result.
  • the polarizing fiber channels must have a minimum bend radius of 4.45 cm (1.75 inches) but generally a 5 cm (2 inch) radius is used.
  • the fiber holding plate of the ceramic subassembly also has a flat reference surface for attachment of the quartz plates, described above, and is used to define the relative orientation of the polarizing fibers.
  • the plate also has features to mount the jacketed fiber.
  • the support plate functions to lock the fiber holding plate subassembly.
  • the ceramic material of the support plate should match the fiber holding plate subassembly material.
  • the cover plate functions to isolate the fibers from the environment. There are angled through-holes for the passage of the jacketed fiber. There are counterbored holes to receive the vibration isolators and to allow for optional external housing clamping screws.
  • the cover plate material may match the ceramic or it may be made from a plastic.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Claims (8)

  1. Halter für einen faseroptischen Stromsensor, mit
    einer Trägerplatte (44),
    einer mit der Trägerplatte (44) verbundenen Faserhalteplatte (10) mit darin ausgebildeten Sensor- und Polarisierungs-Faser-Kanälen (12,14), wobei die Faserhalteplatte (10) einen abnehmbar befestigten Temperungseinsatz (18,24) aufweist,
    einer mit der Faserhalteplatte (10) verbundenen Abdeckplatte (48), und
    einem Gehäuse (56) zur Aufnahme der verbundenen Platten (10,44,48), wobei das Gehäuse (56) ringförmige Führungen (60a,60b) aufweist und die Platten (10,44,48) einen sich durch die Platten erstreckenden koextensiven Stromleiter-Port (10a,44a,48a) aufweisen, die ringförmigen Führungen zwecks Aufnahme eines Stromleiters mit dem Stromleiter-Port ausgerichtet sind, und das Gehäuse (56) mit Vibrations-Befestigungsteilen (62) zum Isolieren von Vibration innerhalb des Gehäuses (56) versehen ist.
  2. Stromsensor-Halter nach Anspruch 1, bei dem die Faserhalteplatte (10) aus ein Material aufweist, das wiederholt Temperaturen von bis zu 1000°C ausgesetzt werden kann.
  3. Stromsensor-Halter nach Anspruch 1 oder 2, ferner mit einer Vorrichtung (22,26) zum Verriegeln des Einsatzes (18,24) an der Faserhalteplatte (10).
  4. Stromsensor-Halter nach einem der Ansprüche 1 bis 3, ferner mit einer Haltevorrichtung (32) zum Halten von Fasern in den Kanälen (12,14).
  5. Stromsensor-Halter nach einem der Ansprüche 1 bis 4, ferner mit einer flachen Referenzfläche (40) zur Beibehaltung der Orientierung zum Polarisieren von Fasern in den Polarlslerungs-Faserkanälen (14).
  6. Stromsensor-Halter nach einem der Ansprüche 1 bis 5, ferner mit in der Abdeckplatte (48) ausgebildeten Faser-Ports (54).
  7. Stromsensor-Halter nach Anspruch 5 oder 5 und 6, ferner mit mindestens einer Quarzplatte (110), die an der flachen Referenzfläche (40) befestigt ist, um die Orientierung an dieser befestigter Fasern beizubehalten.
  8. Stromsensor-Halter nach einem der Ansprüche 1 bis 7, ferner mit in den Sensorfaser-Kanal (12) eingebrachtem Siliconöl zum Beschränken einer aus der Ebene heraus erfolgenden Bewegung einer in dem Kanal befestigten Faser.
EP97926438A 1997-01-08 1997-05-08 Faseroptischer stromsensorbehälter Expired - Lifetime EP0951648B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01127910A EP1197773A3 (de) 1997-01-08 1997-05-08 Keramischer faseroptischer Stromsensor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/780,610 US5935292A (en) 1997-01-08 1997-01-08 Annealing mold and retainer for making a fiber optic current sensor
US780610 1997-01-08
PCT/US1997/007898 WO1998030915A1 (en) 1997-01-08 1997-05-08 Ceramic fiber optic current sensor

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP01127910A Division EP1197773A3 (de) 1997-01-08 1997-05-08 Keramischer faseroptischer Stromsensor

Publications (2)

Publication Number Publication Date
EP0951648A1 EP0951648A1 (de) 1999-10-27
EP0951648B1 true EP0951648B1 (de) 2002-08-07

Family

ID=25120091

Family Applications (2)

Application Number Title Priority Date Filing Date
EP97926438A Expired - Lifetime EP0951648B1 (de) 1997-01-08 1997-05-08 Faseroptischer stromsensorbehälter
EP01127910A Withdrawn EP1197773A3 (de) 1997-01-08 1997-05-08 Keramischer faseroptischer Stromsensor

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP01127910A Withdrawn EP1197773A3 (de) 1997-01-08 1997-05-08 Keramischer faseroptischer Stromsensor

Country Status (5)

Country Link
US (2) US5935292A (de)
EP (2) EP0951648B1 (de)
AU (1) AU3120897A (de)
DE (1) DE69714607T2 (de)
WO (1) WO1998030915A1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6188811B1 (en) * 1998-10-31 2001-02-13 The Texas A&M Universtiy System Fiber optic current sensor
US6307632B1 (en) 1999-03-24 2001-10-23 The Texas A&M University System Magnetic field integrated fiber optic sensor with improved sensitivity
US6321018B1 (en) * 1999-07-30 2001-11-20 Lucent Technologies, Inc. Fiber optic tray cover
US6389211B1 (en) * 2000-06-09 2002-05-14 Cisco Technology, Inc. Fiber optic cable storage device
US6678455B1 (en) * 2000-09-08 2004-01-13 Telect, Inc. Fiber optic cable bend radius management system
US6396965B1 (en) * 2000-11-22 2002-05-28 Tektronix, Inc. Twisting fiber depolarizer
US6763170B2 (en) * 2001-02-02 2004-07-13 Tyco Telecommunications (Us) Inc. System for storing splices in a joint box
JP4652594B2 (ja) * 2001-03-19 2011-03-16 古河電気工業株式会社 光モジュール
WO2008065196A2 (en) * 2006-11-30 2008-06-05 North Sensor A/S Faraday effect current sensor
EP2919022A3 (de) * 2007-11-30 2015-10-21 PowerSense A/S Sensoranordnung und Verfahren zur Messung von Blitzschlägen
WO2010012301A1 (en) * 2008-07-30 2010-02-04 Abb Research Ltd Generator circuit breaker with fiber-optic current sensor
TWI509698B (zh) 2013-12-25 2015-11-21 Ind Tech Res Inst 用於退火裝置的樣品座與使用此樣品座的電流輔助退火裝置
CN111721975B (zh) * 2020-08-03 2024-07-02 北京世维通光智能科技有限公司 一种光纤电流传感器测量仪机箱
EP4506696A1 (de) * 2023-08-08 2025-02-12 Siemens Aktiengesellschaft Vorrichtung zur magneto-optischen ermittlung eines stromes durch einen elektrischen leiter

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US1678812A (en) * 1927-03-07 1928-07-31 Fred R Hornig Mold for composite articles
US2133019A (en) * 1936-03-26 1938-10-11 Aetna Rubber Company Mold
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US3579799A (en) * 1968-04-10 1971-05-25 Felt Products Mfg Co Method of making a grooved mold
DE3532312A1 (de) * 1985-09-11 1987-03-12 Philips Patentverwaltung Verfahren zur herstellung einer verbindung zwischen zwei optischen leitungen und anordnung zur ausuebung des verfahrens
JPH0225761A (ja) * 1988-07-14 1990-01-29 Toshiba Corp 光変流器
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US5051577A (en) * 1990-03-20 1991-09-24 Minnesota Mining And Manufacturing Company Faraday effect current sensor having two polarizing fibers at an acute angle
US5185845A (en) * 1990-12-13 1993-02-09 At&T Bell Laboratories Optical fiber closure having enhanced storage capability
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US5492552A (en) * 1994-03-03 1996-02-20 Minnesota Mining And Manufacturing Company Holder for annealing fiber optic coils
JP3231213B2 (ja) * 1995-04-04 2001-11-19 松下電器産業株式会社 光センサ装置及びその製造方法

Also Published As

Publication number Publication date
DE69714607D1 (de) 2002-09-12
AU3120897A (en) 1998-08-03
EP1197773A2 (de) 2002-04-17
US5935292A (en) 1999-08-10
WO1998030915A1 (en) 1998-07-16
DE69714607T2 (de) 2003-04-10
US5999668A (en) 1999-12-07
EP0951648A1 (de) 1999-10-27
EP1197773A3 (de) 2004-11-03

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